ଚତୁର୍ଭୁଜ

ଏହି ଲେଖାଟି ଜ୍ୟାମିତିକି ଆକାର ବାବଦରେ । ବାକିସବୁ ପାଇଁ, ଚତୁର୍ଭୁଜ (ବହୁବିକଳ୍ପ) ପ୍ରସଙ୍ଗଟି ଦେଖନ୍ତୁ ।

ଯୁକ୍ଲିଡୀୟ ଜ୍ୟାମିତି ଅନୁସାରେ ଚତୁର୍ଭୁଜ ହେଉଛି, ଚାରି 'ବାହୁ' ଓ ଚାରି 'କୋଣ' ଥିବା ଏକ ବହୁଭୂଜ । ଏହା ସରଳ (କୌଣସି ବାହୁ ପରସ୍ପରକୁ ଛେଦ କରିନଥାନ୍ତି) କିମ୍ବା ଜଟିଳ (କୌଣସି ଦୁଇ ବାହୁ ପରସ୍ପରକୁ ଛେଦ କରିଥାନ୍ତି) ହେଇପାରେ । ସରଳ ଚତୁର୍ଭୁଜ, ଉତ୍ତଳ କିମ୍ବା ଅବତଳ ହେଇପାରେ ।

Quadrilateral
Six different types of quadrilaterals
Edges and vertices	4
Schläfli symbol	{4} (for square)
Area	various methods; see below
Internal angle (degrees)	90° (for square and rectangle)

ଏହାର ଚାରି କୋଣର ସମଷ୍ଟି: $\angle A+\angle B+\angle C+\angle D=360^{\circ }.$

ବାହାର ଲିଙ୍କ

• Weisstein, Eric W., "Quadrilateral", MathWorld.
• Encyclopedia of Quadri-Figures by Chris Van Tienhoven
• Compendium Geometry Analytic Geometry of Quadrilaterals
• Quadrilaterals Formed by Perpendicular Bisectors, Projective Collinearity and Interactive Classification of Quadrilaterals from cut-the-knot
• Definitions and examples of quadrilaterals and Definition and properties of tetragons from Mathopenref
• A (dynamic) Hierarchical Quadrilateral Tree at Dynamic Geometry Sketches
• An extended classification of quadrilaterals at Dynamic Math Learning Homepage
• Quadrilateral Venn Diagram Quadrilaterals expressed in the form of a Venn diagram, where the areas are also the shape of the quadrilateral they describe.
• The role and function of a hierarchical classification of quadrilaterals by Michael de Villiers